N-Benzyl-4-chloro-1-(4-methylphenyl)-1H-pyrazole-5-carboxamide CAS 321571-51-1
| CAS No. | 321571-51-1 |
| Molecular Formula | C18H16ClN3O |
| Molecular Weight | 325.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
CATO supplies N-Benzyl-4-chloro-1-(4-methylphenyl)-1H-pyrazole-5-carboxamide (CAS 321571-51-1), a certified reference material (molecular formula C18H16ClN3O, MW 325.79 g/mol) for analytical method development and quality control.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, N-Benzyl-4-chloro-1-(4-methylphenyl)-1H-pyrazole-5-carboxamide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 325.79 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C18H16ClN3O |
| Molecular Weight | 325.79 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Recommended Standards
- N-[(4-Chlorophenyl)-(2-hydroxynaphthalen-1-yl)-methyl]-acetamide (CAS 332174-65-9)
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- tert-Butyl 2-chloro-6a,7,9,10-tetrahydro-5H-pyrazino[1',2':4,5]pyrazino[2,3-c]pyridazine-8(6H)-carboxylate (CAS 2660236-96-2)
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